I get the usage as a dig at do nothing office jobs, but what are these jobs really? I've never worked in an office or known anyone who did well enough to ask.
So what are these jobs actually like? How do they exist in the first place? Could I lie my way into getting one lol?
Anything can be a project, in basically any industry. Marketing or advertising campaigns, development of new products... A relative works for a huge corp that renovates buildings after flooding and there are tons of different teams of people that need to be coordinated among and between to complete that kind of job. Think of a hospital that is full of mold after a flood and the kind of rigorous restoration needed to bring it back into a usable state.
Another whole category are government contracts: there are engineering and architecture firms that employ thousands of people with hundreds of contracts, having teams of dozens of people making plans for all kinds of shit for the feds, states, and cities (transportation, infrastructure, land use, conservation... You name it). Then all of those plans have things that need to get implemented, usually by construction crews with their own PMs.